The effect of different fused metals on the full crown of fused metal in front teeth
Objective To compare the effect of nickel chromium alloy and gold deposition on the restoration of porcelain fusion-to-metal crown(PFM)and gingival crevicular fluid(GCF)inflammation factors.Methods 86 patients(86 teeth)who received porcelain fused to metal crown restoration of anterior teeth in our hospital from September 2020 to February 2022 were selected.According to different restoration materials,they were divided into Ni-Cr alloy group and gold deposition group,with 43 cases(43 teeth)in each group.The therapeutic effect and the level of inflammatory factors in gingival crevicular fluid were compared between two groups.Results The restoration color,edge fit,edge coloration and secondary caries in the gold deposition group were significantly better than those in the nickel-chromium alloy group(P＜0.05).After 6 months of repair,the levels of TNF-α,IL-6,IL-1 β and MMP-2 in GI,PD,GCF and GCF in the gold deposition group were significantly lower than those in the nickel-chromium alloy group(P＜0.05).The satisfaction degree of gold deposition group was significantly higher than that of the nickel-chromium alloy group(93.02％vs.74.42％,P＜0.05).Conclusion Nickel chromium alloy and gold deposit are commonly used materials for PFM crown restoration of anterior teeth.The latter has little impact on the local periodontal tissue of patients,and is superior to the former in reducing the level of GCF inflammatory factors,improving the restoration aesthetics and patient satisfaction.
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